Definitions for "Songfic"
Keywords:  lyric, fic, fanfic, fanfiction, heavily
A story based on the lyrics of a song, with the lyrics inserted into the fic. This is not to say that every story that has lyrics in it is a songfic. Songfics are those stories which depend so heavily on the lyrics that the story could not possibly make sense without the lyrics as reference. Songfics tend to be horrible and pointless, and some archives and mailing lists ban them.
Using a song's lyrics as a background
a fic set around or themed against a songg. Songfics are almost always titled after the song in question and include the actual lyrics interspersed throughout the story.